Wall charger



FIG. 1 is a front top right perspective view of a wall charger showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a right side elevation view thereof.

The broken lines in the drawings are for the purpose of illustrating unclaimed portions of the USB wall charger and form no part of the claimed design. 

CLAIM I claim the ornamental design for a wall charger, as shown and described. 